"The Boss" christened new $1.1 billion Yankee Stadium with World Series Championship in October; team had a relatively frugal off-season compared to last year's $450 million spending spree. Bought Yankees from CBS for $10 million in 1973; franchise now worth $1.5 billion but is 95% leveraged thanks to Yankee Stadium debt. Vast majority of net worth made up by YES Network: regional cable channel broadcasts the Bronx Bombers to New York City and beyond.